Power-controlling device.



No. 7|5,9|8. Patented Dec. l6, I902.

R. WICK. POWER CONTROLLING DEVIGE.

(Application filed Mar. 1, 1902.)

(No Model.)

1 INVENTOH 3 /fi4; ATTORNEY W/ TYVE SSE S j UNITED STATES PATENT @rrrcn.

ROBERT YVICK, OF CARLSTADT, NEW JERSEY.

POWER-=CONTROLLING DEVICE.

SPECIFICATION forming part of Letters Patent No. 715,918, dated December 16, 1902.

Application filed March 1, 1902. Serial No. 96,217. (No model.)

To all whom it may concern:

Be it known that I, ROBERT WIoK, a citizen of Switzerland, residing at Oarlstadt, in the county of Bergen, New Jersey, have invented certain new and useful Improvements in Power-Controlling Devices, of which the following is a specification.

This invention relates to improvements in power-controlling devices; and the object of my invention is to provide a new and improved attachment for power-transmitting devices,whereby whenever more power is taken from a shaft than was intended this device automatically severe the connection between the driving and driven parts of the powertransmitting gear, so that the driven part comes to a standstill until it is again coupled with the-driving part.

In the accompanying drawings, in which like letters of reference indicate like parts in both figures, Figure 1 is an edge view of one construction of my improved power-controlling device as applied on a shaft. Fig. 2 is a side view of the same, parts being shown in section and parts in dotted lines.

The pulley A is loosely mounted on the shaft B and is rotated in thedirectionof the arrow 00', Fig. 2, by the belt 0 or in place thereof by any other suitable contrivan ce. A lever D is pivoted at D to the inner face of the pulley A, near the rim thereof, and is provided with a toe E, which projects from the pivoted end toward the periphery of the pulley. A spring F, attached to said lever D and to the inner face of the pulley A, holds the inner end of said lever against a stop-pin G, projecting from the pulley. A latch H is pivoted to the inner face of the pulley A at H and is provided with an arm H which is pressed against a stop-pin J by a spring K, attached to said latch and to the pulley A. When the latch H is in the position shown in Fig. 2, its end rests against the end of the lever D and prevents the same from swinging in the direction from the stop-pin G. A powerful helical spring L (shown in dotted lines in Fig. 2) is secured by a pin L or in any other suitable manner to the inner face of a disk M, keyed on the shaft B adjacent to the pulley A, and at its free end this spring is provided with an eye or hook 0, adapted to receive the toe E on the pivoted end of the lever D. A tripping-pin P projects from the inner surface of the disk M and is so located that-a circle passed through it and concentric with shaft B will be within the outer end of the arm H of the latch H, or, in other words, the end of the arm H of the latch H will be in the path of this tripping-pin P.

The operation is as follows: The spring L is gaged according to the power to be transmitted. For example, if ten horse-power are to be transmitted from the pulley A to the shaft B the spring L is so gaged that under the strain of transmitting ten horse-power it will not stretch beyond a certain limit; but if a load is placed on the shaft B which is greater than ten horse-power the spring L will be stretched beyond said limit, and as said spring is stretched the pin P approaches the end of the arm H of the latch H and finally strikes against this arm and forces the same inward, thereby disengaging the end of the latch H from the end of the lever D, the inner end of which is now swung outward under the great strain and tension of the spring ,L, and thereby the toe E is swung inward and withdrawn from the eye 0 in the end of the spring, or, in other words, the end of the spring slips off the toe, whereby the connection between the driving-pulley A and the driven disk M is destroyed, as this spring is the connecting medium, and thus no more power is transmitted from the driving-pulley A to the driven disk M and the shaft B necessarily stops. In order to drive the shaft B, the spring L must again be engaged with the lever D and the latter locked in place by the.

latch H.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with a driven shafts and a clutch member fixed thereon, of a driving clutch member independent of the clutch member on the shaft and adjacent thereto, an extensible connection between the two clutch members, permanently secured to one of them, means on the other member for holding said extensible connection, a latch for locking said means in place, and means on the member to which the extensible connection is permanently attached for tripping said latch, substantially as set forth.

2. The combination with a driven shaft, and a clutch member fixed thereon, of a driving clutch member independent of the clutch member of the shaft and adjacent thereto, a spring attached to the driven member, a lever pivoted on the driving member and having means for engaging the free end ofsaid spring, a latch pivoted on the driving clutch member and engaging the free end of said lever, and a tripping-pin on the driven clutch member, part of the latch on the driving clutch member extending into the path of said pin, substantially as set forth.

3. The combination with a driven shaft, and a clutch member fixed thereon, of a driving clutch member independent of the clutch member of the shaft and adjacent thereto, an extensible spring having one end secured to the driven clutch member and provided at its free end with an eye, a lever pivoted on the driving clutch member and provided at its pivoted end with a toe adapted to enter the eye of said extensible spring, a latch pivoted on the driving clutch member and a pin on the driven clutch member for tripping said latch, substantially as set forth.

at. The combination with a driven shaft, and a clutch member fixed thereon, of a driving clutch member independent of the clutch member on the shaft and adjacent thereto, an extensible spring attached at one end to the driven clutch member and having one end free, a lever pivoted to the driving clutch member and having a toe at its pivoted end for engaging the free end of the extensible spring, a spring pressing said lever against a stop, a latch engaging the swinging end of said lever and pivoted to the driving clutch member, a spring acting on said latch and a pin on the driven clutch member for tripping said latch, substantially as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 26th day of February, 1902.

ROBERT VVICK.

\Vitnesses:

OSCAR F. GUNZ, ELLA OETJAN. 

